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June 4th, 2026

How Does Past Income Affect Your Medicare Premiums? (IRMAA Explained) 💰

Did you know that making just $1 too much can drastically spike your Medicare costs? 👇

Medicare’s Income-Related Monthly Adjustment Amount (IRMAA) is a surcharge added to your Part B and Part D premiums based on your income from two years prior. Unlike regular progressive tax brackets, IRMAA is a "cliff tax." If you cross the threshold by even a single dollar, you owe the entire surcharge for that tier.

For a married couple filing jointly, the base threshold is $218,000 of Modified Adjusted Gross Income (MAGI), while for single filers, it is $109,000. If your income sits below these limits, you’ll avoid the surcharge entirely. However, if you step over the line, you instantly land in a higher bracket. This makes forward-looking financial planning essential to avoid costly, irreversible premium spikes.

🔑 Key Takeaways:
– The Two-Year Lookback: Your current Medicare premiums are entirely driven by the tax returns you filed two years ago.

– The Danger of the "Cliff": Going a single dollar over an IRMAA bracket line forces you to pay the full surcharge for that tier—there is no pro-rating.

– Proactive Planning: Building a comprehensive financial plan allows you to control taxable events (like Roth conversions or investment sales) so you stay safely below the threshold.

Questions? Email us at [email protected], call us at (919) 535-8261, or visit our website at https://cardinalguide.com/

Hans Scheil Hans “John” Scheil, CFP®

Hans “John” Scheil is the author of The Complete Cardinal Guide and has over 40 years of experience specializing in helping individuals at or near retirement. John’s insurance career began at the age of 18, when he sold insurance while attending college full time. His years in the insurance industry included positions as a Branch Manager, National Sales Director, and Senior Vice President for several nationally recognized insurance companies. John holds a Bachelor of Science degree from Northern Illinois University (1980) and a Master of Science in Management from The American College (2007).

John resides in Cary, North Carolina, with his wife, Ronda, and dog, Ellie, and has two grown sons. He is involved locally with StepUp Ministries and the Alzheimer’s Association. John enjoys golf, traveling the world, and leadership.